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Finding the Fourth Proportional to 65,399.93, 90,228.75 and 42,751.97

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Solution

The fourth proportional to 65,399.93, 90,228.75 and 42,751.97 is: 58,982.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,399.93 : 90,228.75 = 42,751.97 : x
  2. Step 2: Convert to fraction form
    65,399.93/90,228.75 = 42,751.97/x
  3. Step 3: Cross multiply
    65,399.93x = 90,228.75 × 42,751.97
  4. Step 4: Simplify right side
    65,399.93x = 3,857,456,813.14
  5. Step 5: Solve for x
    x = 3,857,456,813.14/65,399.93
  6. Step 6: Final answer
    x = 58,982.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.